don't I curb? don't you curb? doesn't he curb? don't we curb? don't you curb? don't they curb?
Presente continuo
am I not curbing? aren't you curbing? isn't he curbing? aren't we curbing? aren't you curbing? aren't they curbing?
Pretérito
didn't I curb? didn't you curb? didn't he curb? didn't we curb? didn't you curb? didn't they curb?
Pretérito continuo
wasn't I curbing? weren't you curbing? wasn't he curbing? weren't we curbing? weren't you curbing? weren't they curbing?
Presente perfecto
haven't I curbed? haven't you curbed? hasn't he curbed? haven't we curbed? haven't you curbed? haven't they curbed?
Presente perfecto continuo
haven't I been curbing? haven't you been curbing? hasn't he been curbing? haven't we been curbing? haven't you been curbing? haven't they been curbing?
Pluscuamperfecto
hadn't I curbed? hadn't you curbed? hadn't he curbed? hadn't we curbed? hadn't you curbed? hadn't they curbed?
Pluscuamperfecto continuo
hadn't I been curbing? hadn't you been curbing? hadn't he been curbing? hadn't we been curbing? hadn't you been curbing? hadn't they been curbing?
Futuro simple
won't I curb? won't you curb? won't he curb? won't we curb? won't you curb? won't they curb?
Futuro continuo
won't I be curbing? won't you be curbing? won't he be curbing? won't we be curbing? won't you be curbing? won't they be curbing?
Futuro perfecto
won't I have curbed? won't you have curbed? won't he have curbed? won't we have curbed? won't you have curbed? won't they have curbed?
Futuro perfecto contínuo
won't I have been curbing? won't you have been curbing? won't he have been curbing? won't we have been curbing? won't you have been curbing? won't they have been curbing?
Condicional
Presente
wouldn't I curb? wouldn't you curb? wouldn't he curb? wouldn't we curb? wouldn't you curb? wouldn't they curb?
Presente continuo
wouldn't I be curbing? wouldn't you be curbing? wouldn't he be curbing? wouldn't we be curbing? wouldn't you be curbing? wouldn't they be curbing?
Passado
wouldn't I have curbed? wouldn't you have curbed? wouldn't he have curbed? wouldn't we have curbed? wouldn't you have curbed? wouldn't they have curbed?
Passado continuo
wouldn't I have been curbing? wouldn't you have been curbing? wouldn't he have been curbing? wouldn't we have been curbing? wouldn't you have been curbing? wouldn't they have been curbing?